Ink Jet Recording Brightness Control for Porous Layer Contamination
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Solution Overview
Problem
Existing ink jet recording methods face challenges in preventing contamination of images when using multiple water-based inks, particularly due to the adhesion of coloring materials to porous layers, which leads to subsequent image contamination.
Innovation Solution
The method involves using an aqueous reaction liquid with two water-based inks of different brightness levels, where the ink with higher brightness is applied second to minimize adhesion to the porous layer, and a liquid absorption step to absorb the liquid component from the first image, reducing contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a porous layer is used to absorb liquid components from the first image, then the liquid component removal efficiency is improved, but the porous layer becomes contaminated with coloring materials after repeated use
Solution Approach 1:
The patent changes the brightness parameter of the ink to resolve the contradiction. By using ink with a brightness of 80% or higher, the coloring material adhering to the porous layer becomes less conspicuous, thereby reducing the visual impact of contamination while maintaining effective liquid component removal functionality.
2Adaptability or versatility
If multiple water-based inks are used for recording, then the image quality and color variety are improved, but the contamination of subsequent images increases
Solution Approach 1:
The patent applies brightness parameter control to resolve the contradiction between multi-ink recording capability and image contamination. By specifying that the ink brightness should be 80% or higher, the invention enables versatile multi-ink recording while minimizing the visual impact of coloring material adhesion to the porous layer, thus reducing subsequent image contamination.
3Productivity
If the liquid absorption member is reused for multiple images, then the productivity is improved, but the contamination of recorded images increases
Solution Approach 1:
The patent resolves the contradiction between productivity and image contamination by changing the brightness parameter of the ink. By using ink with brightness of 80% or higher, the invention enables repeated use of the liquid absorption member for multiple images at high speed while making any adhesion of coloring materials to the porous layer less conspicuous, thereby maintaining image quality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively suppresses image contamination by ensuring the higher-brightness ink is on the surface, making subsequent adhesion less conspicuous and reducing the likelihood of contamination, even after repeated use of the liquid absorption member.
Implementation Method 1
a liquid absorption step for bringing a porous layer possessed by a liquid absorption member into contact with the first image to absorb a liquid component from the first image
Data Source
AI summary
Provided is an ink jet recording method for recording an image on a recording medium by making use of an aqueous reaction liquid containing a reactant and first and second inks which are aqueous inks containing a coloring material. This method has a step of applying the reaction liquid to a first recording medium, a step of applying the first and second inks, in order of mention, to the first recording medium to form a first image and a step of bringing a porous layer of a liquid absorption member into contact with the first image and thereby absorbing a liquid component therefrom. The second image has brightness higher than that of the first ink.